【单选题】为研究所在城市某区室内污染情况,某学者选择了若干户人家,检测室内二氧化碳、二氧化硫、甲醛和氡等指标。结果发现,某一栋大楼内居民室内氡明显超过卫生标准,且随着楼层的增高,含量有所下降。由此判断:氡可能来源于
【简答题】News item 2 Listen to the news report and choose the best answer to each question you hear. 1. A) Poor relationships with parents. B) Attention-deficit disorder. C) Being severely overweight. D) Psych...
【判断题】一个EXCEL 2010工作簿文件是由一张或多张工作表组成。
【简答题】What did people do to celebrate the Mid-summey Festival in Finland? A. Singing and dancing. B. Eating and drinking. C. Traveling. D. Having Sauna.
【单选题】为研究所在城市某区室内污染情况,某学者选择了若干户人家,监测室内二氧化碳,二氧化硫、甲醛和氡等指标。结果发现,某一栋大楼内居民室内氡明显超过卫生标准,而且随着楼层的增高,含量有所下降。由此判断,氡最可能来源于
【简答题】Read and match. 把名词和动词匹配起来。 ( )1. monkeys ( )2. elepants ( )3. fish ( )4. bird A. drinking water B. climbing C. flying D. swimming
【简答题】CET 4 Listening ( Model Test One) Section A Questions 1 and 2 will bebased on the following news item. 1. A) There are more coffee drinkers aroundthe world. B) Drinking coffee helps people live...
【简答题】CET 4 Listening ( Model Test One) Section A Questions 1 and 2 will bebased on the following news item. 1. A) There are more coffee drinkers around theworld. B) Drinking coffee helps people livelonger....
【简答题】Categories 1. Good Hygienic Practices 2. Pring Contamination by Hands 3. Approved Sources 4. Protection from Contamination 5. Chemicals Operations A. All food is stored or prepared from approved ...
【单选题】为研究所在城市某区室内污染情况,某学者选择了若干户人家,检测室内CO2、SO2、甲醛和氡等指标。结果发现,某一栋大楼内居民室内氡明显超过卫生标准,且随着楼层的增高,含量有所下降。由此判断:氡最可能来源于( )